1 #ifndef __XFS_SUPPORT_RWLOCK_H__
2 #define __XFS_SUPPORT_RWLOCK_H__
9 typedef struct sx rwlock_t;
10 typedef int wait_queue_head_t;
12 #define rwlock_init(lock) sx_init(lock, "rwlock")
13 #define rwlock_destroy(lock) sx_destroy(lock)
14 #define read_lock(lock) sx_slock(lock)
15 #define read_unlock(lock) sx_sunlock(lock)
16 #define write_lock(lock) sx_xlock(lock)
17 #define write_trylock(lock) sx_try_xlock(lock)
18 #define write_unlock(lock) sx_xunlock(lock)
19 #define rwlock_trypromote(lock) sx_try_upgrade(lock)
20 #define rwlock_demote(lock) sx_downgrade(lock)
23 #endif /* __XFS_SUPPORT_RWLOCK_H__ */